Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> aeb84ec053f46244f719ee05bc1074ee4275b970316a6a1b980a72f979c7a725:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16